Box-Design Pro-Ject Stream Box RS Specifications

Box-Design Pro-Ject Stream Box RS Specifications
Pro-Ject Head Box DS
Dear music lover,
thank you for purchasing a PRO-JECT AUDIO headphone amplifier.
In order to achieve maximum performance and reliability you should study these instructions for use carefully.
Warning of a hazard for the user, the unit or possible misuse.
Important notice.
Safety instructions
AC outlet voltages vary from country to country. Before connecting to the mains, make sure that the
voltage in your area meets the voltage requirements printed on the power supply.
The power supply is used to disconnect the unit from the mains. Make sure that the power supply is easily
accessible at all times. Never handle the device, the power supply while your hands are wet or damp.
Avoid letting liquids enter the device or the power supply. Never place any item containing liquid,
such as a flower vase on or near the device. Never spill any liquid on the device or the power supply.
Never place any naked flame sources, such as lighted candles on or near the device. The product shall not
be used in damp or wet locations, next to a bathtub, sink, swimming pool or any other similar conditions.
Make all connections whilst the amplifier is disconnected from the power supply.
Take care to connect the left and right channels correctly. The right channel is usually marked red, the
left channel black or white.
Never use any other power supply than the one supplied with the unit.
Connection to the amplifier (recorder)
Connect the TAPE / RECORD OUT RCA/phono sockets from your amplifier to the In RCA/phono sockets of
the headphone amplifier. The Out RCA/phono sockets of the headphone amplifier can be connected to the
input sockets of your recorder.
Sources with an digital output such as a CD player can be connected to the digital inputs (coaxial and optical).
A computer can be connected to the USB input.
Connecting to a Computer
Connect the USB-input to a free USB-socket on your computer and turn it on/make sure it is powered on.
The DAC will be automatically recognised by the computer. There is no need to install a driver manually.
Please note: Connection should be made to an USB-socket of your computer directly. Connecting to
USB-hubs or switches can cause problems.
© Audio Trade GmbH · Pro-Ject Head Box DS · Revision 2012.11.1
Mains power connection
Connect the low voltage plug from the power supply to the Power 18V
power supply to the mains.
socket before connecting the
Front panel controls
Head Box DS
Please set the volume level to minimum before connecting the headphone.
Minimum impedance of the head phone 30ohms.
To switch on from standby or to standby
will toggle the unit between its fully operational status and standby.
Input selector
Pressing repeatedly selects the inputs in turns. The selected input and the sampling frequency of the input
signal will be shown in the display.
Connecting a headphone
Connect the headphones to the ¼“ (6,3mm ) jack socket on the front of the headphone amplifier.
Adjust the volume (87 steps) to the desired level using the buttons
the display. -87dB indicates min., 00dB max..
and . The volume level will be shown in
Headphone replay
Use the input selector of the amplifier to choose the source you wish to hear.
© Audio Trade GmbH · Pro-Ject Head Box DS · Revision 2012.11.1
Pro-Ject Direct Streaming - Kernel Streaming (Windows XP® operating system only)
Normally the audio data that comes from CD gets resampled by the Windows® Kernel Mixer. This conversion
process deteriorates the audio performance.
CD device
Kernel Mixer
to 48kHz
Sound card
Audio output R/L
Pro-Ject Direct Streaming allows bit-by-bit processing. This avoids unwanted signal alteration of the original
signal through by-passing the Windows® Kernel Mixer of your PC.
For replay a suitable software player, like for instance foobar2000, will be needed.
If Pro-Ject Direct Streaming will not be used, any software player will be suitable.
CD device
Kernel Mixer
to 48kHz
Kernel Streaming
Sound card
Audio output R/L
Pro-Ject Direct Streaming and foobar2000 software
Download the software (
and install it. To do so, double-click install.bat and follow the instructions.
Complete the installation by restarting the computer.
Please be aware that downloads from the Internet are made entirely at your own risk. Under no
circumstances can we carry responsibility or provide support for software products sourced from the
internet or for any damage or problems arising from the use thereof. All downloads should be
checked with an up-to-date anti-virus programme. License fees may be applicable.
Potential incorrect use and fault conditions
No signal on one or both channels:
No connection between headphone and headphone amplifier ore amplifier. This could be due
to a faulty plug, broken wire or solder joint or simply loose plug/socket connection.
Headphone does not work:
Headphone volume control is at minimum.
Amplifier Tape-Monitor circuit is not activated.
© Audio Trade GmbH · Pro-Ject Head Box DS · Revision 2012.11.1
Technical specifications Pro-Ject Head Box DS
Power output:
Headphone connection:
Signal to noise:
Frequency response:
Headphone jack:
Line-level input:
Line-level output:
Supported audio format:
Sampling rates
USB input:
Optical input:
Coaxial input:
USB input:
USB signal:
Operating systems:
Outboard power supply:
Power consumption:
Dimensions W x H x D (D with sockets):
350mW/30ohms, 60mW/300ohms
> 30ohms
112dB (A weighted) at full output
20Hz - 20kHz/-0,5dB
3-pole ¼“ (6,3mm ) co-axial jack
1 pair RCA/phono sockets
1 pair RCA/phono sockets
Cirrus Logic CS4344.
24Bit/192kHz Delta Sigma-D/A-Wandler
PCM (LPCM). No support for multi channel formats like Dolby® AC-3 or DTS™
44,1kHz and 48kHz
44,1kHz, 48kHz, 88,2kHz and 96kHz
44,1kHz, 48kHz, 88,2kHz, 96kHz, 176,4kHz and 192kHz
5 pin mini b connector (USB cable supplied)
digital serial data protocol USB 2.0
Windows XP®, Windows VISTA®, Windows 7® and Mac OS®
18V/1.000mA DC, suitable for your country's mains supply
500mA DC, <1W in standby
103 x 72 x 144 (150)mm
990g without power supply
Should you encounter a problem which you are not able to alleviate or identify despite the above information,
please contact your dealer for further advice. Only when the problem cannot be resolved there should the
unit be sent to the responsible distributor in your country.
The manufacturer accepts no responsibility for damage caused by not adhering to these instructions
for use. Modification or change to any part of the product by unauthorized persons release the
manufacturer from any liability over and above the lawful rights of the customer.
Copyright, trademarks
PRO-JECT is a Registered Trademark of H. Lichtenegger. The information was correct at the time of going to
press. The manufacturer reserves the right to make
This guide was produced by: Audio Trade GmbH
changes to the technical specification without prior
Copyright © 2012. All rights reserved.
notice as deemed necessary to uphold the ongoing
process of technical development.
Windows XP®, Windows Vista® and Windows 7® are trademarks of the Microsoft group of companies. Mac®
and Mac OS® are trademarks of Apple Inc., registered in the U.S. and other countries. Dolby® is a registered
trademarks of Dolby Laboratories. DTS™ is a registered trademark of DTS, Inc..
© Audio Trade GmbH · Pro-Ject Head Box DS · Revision 2012.11.1
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